In Enlightenment Now, Steven Pinker delivers a sharp, data-backed defense of the Enlightenment’s core values—reason, science, humanism, and progress—against rising pessimism and anti-Enlightenment backlash. Drawing on cross-disciplinary research, Pinker dismantles the myth of global decline, highlighting tangible improvements: eradicated diseases, plummeting extreme poverty, reduced war deaths, and expanded civil rights. He addresses critics from romanticists to religious conservatives, explaining how their rejection of rationality ignores decades of human progress. Pinker also confronts modern threats like nuclear war, populism, and climate change, arguing that doubling down on Enlightenment principles is the only way to navigate future challenges. This isn’t just a celebration of the past; it’s a blueprint for sustaining humanity’s upward trajectory by prioritizing evidence, empathy, and collective rationality.